微量Zr对Al-Zn-Mg-Mn合金板材抗剥落腐蚀性能的影响

柴文茹,陈景超,刘胜胆,叶凌英,林化强,张新明

Effect of Minor Zr Addition on Exfoliation Corrosion Resistance of Al-Zn-Mg-Mn Alloy Sheet

Wenru CHAI,Jingchao CHEN,Shengdan LIU,Lingying YE,Huaqiang LIN,Xinming ZHANG

表3 两种板材的晶界特性统计结果

Table 3 Results of grain boundary characteristics

Alloys Width of PFZs /nm Size of GBPs /nm Spacing of GBPs/nm Area fraction of GBPs /% Elements of GBPs/%, atomic fraction Zn Mg Cu Al-Zn-Mg-Mn 56.1±6.2 53.6±9.0 31.5±23.1 8.4±2.1 13.1±8.6 6.5±3.6 0.6±0.1 Al-Zn-Mg-Mn-Zr 52.9±11.3 84.2±26.2 72.2±63.4 8.9±2.7 13.8±3.3 6.9±1.1 0.7±0.1